I use [
Spybot Anti-Beacon] and ocassionally open it and make sure everything is immunized (Telemetry blocked). If it shows back up afterwards, then Microsoft is probably secretly re-enabling it some way or another and there's not much you can do about it, other than opening Anti-Beacon and trying again. Read the last paragraph on the link below to see what I mean.
There are other programs similar to Anti-Beacon. If you try them, be sure you know what the options are before disabling things. It's really easy to destroy your Windows install with these utilities.
Read this first:
https://www.howtogeek.com/273513/why-you-shouldnt-use-anti-spying-tools-for-windows-10/